meaning of 'out there'

[peteryoung]

They say there's plenty of opportunities out there, you just have to look carefully and you'll find them.

He was out there shouting and yelling.

The police tell me they've finished there investigations out there

You know I don't see out there


My teacher told me 'out there' means 'not inside a building', but I find several instances where this meaning apparently doesn't make sense. For example, what's the point of talking about opportunities that are outside a building?
Would you please help me understand the exact meaning of 'out there'?
Thanks!

[Mister Micawber]

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Outside of the speaker's/listener's current environment, or in a greater milieu of some sort, and not 'here', dependent on the context:


'They say there's plenty of opportunities out there, you just have to look carefully and you'll find them.' -- out in the general world of commerce, industry and employment.

'He was out there shouting and yelling.' -- outside in a place specified in the context.


'The police tell me they've finished their investigations out there' -- out at the scene of the crime or another place under investigation, which is not near 'here'.

'You know I don't see out there' -- out in the dark (?)

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[peteryoung]

Very clear, thank you!